Group the squads together is handy with the CTL+#1 etc (but only really for moving troops from one location to another), anything else and you have to really micro-manage. YOu could used CTRL 1-4 for one squad.
Click #1, and click STORM option on a trench, and all, running a different speeds, will mostly be cut down before they get half across the countryside, or out of the treeline.
So you have to then manually seperate the squad into smaller teams. Heavier weapon troops, set them prone in the tree line and attack an area (where's cover arc option??) for a bit of supporting fire for your advancing troops. There's no point in advancing the Bazooka man to storm the trench either, so you have to set them prone and hold, your commander is armed with a 45 colt (very affective assault weapon *rolls eyes)), who's usually faster and lead the attack (i.e. die first), so it leaves you with 6 squad members armed with Garandes to take on the trench. This is real micro management... and that's without worrying about the other 6 tanks, and 2 squads, who by now have rotated in the wrong direction or have aimlessly wandered over the hill into a a pack of waiting Pak's?